1、Designation: D6566 12Standard Test Method forMeasuring Mass per Unit Area of Turf Reinforcement Mats1This standard is issued under the fixed designation D6566; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers an index to the determination ofmass per unit area of all turf reinforcement mats.1.2 The values stated i
3、n SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health
4、 practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD4354 Practice for Sampling of Geosynthetics for TestingD4439 Terminology for Geosynt
5、hetics2.2 ISO/DIS Document:9864-1990 Mass per Unit Area of Geotextiles33. Terminology3.1 For definitions of textile terms used in this test method,refer to Terminology D123.3.2 For definitions of terms relating to geotextiles used inthis test method, refer to Terminology D4439.4. Summary of Test Met
6、hod4.1 The mass per unit area of a turf reinforcement mat isdetermined by weighing test specimens of known dimensions,cut from equally spaced distances over the full width of thelaboratory sample. The calculated values are then averaged toobtain the mean mass per unit area of the laboratory sample.5
7、. Significance and Use5.1 This test method is used to determine if the turfreinforcement mat meets specifications for mass per unit area.This test method can be used for quality control to determinespecimen conformance. This measurement allows for a simplecontrol of the delivered material by a compa
8、rison of the massper unit area of the delivered material and the specified massper unit area.5.2 The procedure in this test method may be used foracceptance testing of commercial shipments, but caution isadvised since information about between-laboratory precisionis incomplete. Comparative tests in
9、accordance with 5.2.1 areadvisable.5.2.1 In case of a dispute arising from differences inreported test results when using the procedures in this testmethod for acceptance testing of commercial shipments, thepurchaser and the manufacturer should conduct comparativetests to determine if there is a sta
10、tistical bias between theirlaboratories. Competent statistical assistance is recommendedfor the investigation of bias. As a minimum, the two partiesshould take a group of test specimens that are as homogeneousas possible and which are from a lot of material of the type inquestion. The test specimen
11、should then be randomly assignedin equal numbers to each laboratory for testing. The averageresults from the two laboratories should be compared using theappropriate students t-test and an acceptable probability levelchosen by the two parties before testing is begun. If a bias isfound, either its ca
12、use must be found and corrected or thepurchaser and the manufacturer must agree to interpret futuretest results in light of the known bias.6. Apparatus6.1 Balance, calibrated, with an accuracy of 0.01 g.7. Sampling7.1 Lot SampleDivide the test specimens into lots, and forthe lot to be tested, take t
13、he lot sample in accordance withPractice D4354.7.2 Laboratory SampleConsider the units in the lotsample as the units in the laboratory sample. For the laboratory1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.05 o
14、n Geosyn-thetic Erosion Control.Current edition approved July 1, 2012. Published September 2012. Originallyapproved in 2000. Last previous edition approved in 2006as D6566 00R06. DOI:10.1520/D6566-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servic
15、e at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.Copyright ASTM International, 100 Barr Harbor Drive, PO Box
16、C700, West Conshohocken, PA 19428-2959. United States1sample, take a full width swatch of sufficient length along theselvage so that the requirements of 7.3 can be met.7.2.1 The laboratory sample should be free from imperfec-tions or other areas not representative of the material sampled.7.3 The num
17、ber of test specimens shall be a minimum offive, cut such that they are representative of the entire rollwidth and with a combined total minimum area of 230 000 mm2 (356 in.2). Each test specimen shall be equal in area (not lessthan 23 000 mm2(35.6 in.2). Cut each test specimen with anaccuracy of 60
18、.5 % of its area.NOTE 1For test specimens prepared in the field, larger than minimum-sized test specimens will be required to stay within the cutting accuracy(0.5 %). Field experience has shown that a test specimen with an area notless than 207 000 mm2(320.4 in.2) will be necessary to achieve thereq
19、uired accuracy.7.3.1 Cut the test specimens at least one tenth the width ofthe turf reinforcement mat from any selvage, unless otherwisespecified.7.3.2 If the structure of the turf reinforcement mat is suchthat the specified test specimen size is not representative of thelaboratory sample, a larger
20、size shall be agreed upon betweenthe purchaser and the supplier.8. Conditioning8.1 Bring the specimens to moisture equilibrium in theatmosphere for testing turf reinforcement mats, that is atemperature of 21 6 2C (70 6 4F) and relative humidity of60 6 10 %.8.2 Moisture equilibrium is considered to h
21、ave been reachedwhen the increase in mass of the specimen in successivemeasurements made at intervals of not less than 2 h, does notexceed 60.1 % of the mass of the specimen. In general, manyturf reinforcement mats contain more moisture when receivedthan they will after reaching moisture equilibrium
22、. However,certain fibers may exhibit slow moisture equilibrium rates fromthe “as received” wet side. When this is known, a precondi-tioning cycle, a described in Practice D1776, may be agreedupon between contractual parties.9. Procedure9.1 Test the conditioned test specimens in the standardatmospher
23、e for testing turf reinforcement mats as prescribed in8.1.9.2 Care should be taken in handling of the test specimensto avoid altering the natural finished state of the material.9.3 Weigh each of the conditioned specimens separately ona calibrated balance to the nearest 0.01 g.10. Calculation10.1 Cal
24、culate the mass per unit area of each of thespecimens as follows:m 5 Ms 31 000000/A (1)where:m = mass per unit area rounded to the nearest 0.1 g/m2,Ms = mass of the specimen, g, andA = area of the specimen, mm210.2 Repeat this procedure for each test specimen.10.3 Calculate the average and standard
25、deviation of themass per unit area results for the test specimens.11. Report11.1 Report the following information on mass per unit areaof turf reinforcement mats:11.1.1 Type of turf reinforcement mat tested, samplingmethod used, the test specimen size, shape, and the number oftest specimens tested,1
26、1.1.2 The average mass per unit area and standard devia-tion to three significant figures, and11.1.3 A statement of any departures from the suggestedtesting procedures so that the results can be evaluated and used.12. Precision and Bias12.1 PrecisionThe precision of this test method is beingestablis
27、hed.12.2 BiasThe test method has no bias because the value ofmass per unit area can only be defined in terms of a testmethod.13. Keywords13.1 mass per unit area; turf reinforcement mat; weightASTM International takes no position respecting the validity of any patent rights asserted in connection wit
28、h any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible techn
29、ical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considerati
30、on at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Har
31、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D6566 122
